#include <iostream>
using namespace std;
class Box
{
   public : Box( ); //???????????
   //???????????,????????????????
   Box(int h,int w,int len):height(h),width(w),length(len){ }
   int volume( );
   private :
   int height;
   int width;
   int length;
};
Box::Box( ) //???????????
{
   height=10; width=10; length=10;
}
int Box::volume( ){
   return (height*width*length);
}
int main( )
{
   Box box1; //????box1,?????
   cout<<"The volume of box1 is "<<box1.volume( )<<endl;
   Box box2(15,30,25); //????box2,??3???
   cout<<"The volume of box2 is "<<box2.volume( )<<endl;
   return 0;
}